EP0329542B1 - Verfahren zur Herstellung eines Lenkrads, insbesondere für Kraftfahrzeuge - Google Patents

Verfahren zur Herstellung eines Lenkrads, insbesondere für Kraftfahrzeuge Download PDF

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Publication number
EP0329542B1
EP0329542B1 EP89400402A EP89400402A EP0329542B1 EP 0329542 B1 EP0329542 B1 EP 0329542B1 EP 89400402 A EP89400402 A EP 89400402A EP 89400402 A EP89400402 A EP 89400402A EP 0329542 B1 EP0329542 B1 EP 0329542B1
Authority
EP
European Patent Office
Prior art keywords
rim
hub
branch
synthetic material
steering wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89400402A
Other languages
English (en)
French (fr)
Other versions
EP0329542A1 (de
Inventor
Martine Robert
Christian Henigue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ECIA Equipements et Composants pour lIndustrie Automobile SA
Original Assignee
ECIA Equipements et Composants pour lIndustrie Automobile SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ECIA Equipements et Composants pour lIndustrie Automobile SA filed Critical ECIA Equipements et Composants pour lIndustrie Automobile SA
Publication of EP0329542A1 publication Critical patent/EP0329542A1/de
Application granted granted Critical
Publication of EP0329542B1 publication Critical patent/EP0329542B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/04—Hand wheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49488—Steering wheel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y10T74/2087—Rim grips and covers

Definitions

  • the present invention relates to steering wheels in particular for a motor vehicle and, more particularly, those of them which include metal parts and parts made of overmolded synthetic materials.
  • the steering wheel must be relatively light in order to have a reduced mass and a small moment of inertia with respect to the axis of the steering column for reasons notably of comfort.
  • the small mass means that when the vehicle is traveling at high speed or on poor roads, the steering wheel does not vibrate.
  • the small moment of inertia facilitates steering turns and changes of direction when the vehicle is in use.
  • the steering wheel must be able to withstand significant deformation resulting from effort in the event of a violent impact, particularly a frontal impact.
  • the driver's chest comes into contact with the steering wheel, the latter must not cause bruising injuries or cause cuts or puncture wounds.
  • a steering wheel essentially comprises a central hub and a peripheral rim which are connected to each other by at least one arm or branch, approximately radial.
  • flywheels in addition to the hub which is generally made of metal, include other metallic components.
  • the current trend consists in using such a metallic hub and in associating it with rim and branches with metal reinforcements or reinforcements, usually covered with synthetic material in order to satisfy both the mechanical and safety constraints and also of presentation.
  • a metal hub is used which is associated with arms and a rim obtained by a double injection molding technique during which the outer plastic part is first manufactured in which is injected with another charged plastic which serves as a core.
  • a flywheel is produced which, with the exception of its metallic central hub, is made of at least one synthetic material loaded with long fibers and used for semi-finished product in the form of blanks loaded on edge in a mold and shaped by stamping.
  • the object of the invention is to manufacture an improved steering wheel, in particular for a motor vehicle, which comprises only two metal parts in order to satisfy all the usual constraints.
  • the steering wheel designates the internal part of the latter which has a mechanical role, to the exclusion of all subsequent external coatings which give it its final appearance which is pleasant to the sight and to the touch.
  • the subject of the invention is a method of manufacturing a steering wheel for a motor vehicle, the elements of which are disclosed by document EP 0 255 171 appear in the preamble to the main claim and the distinctive features of which are explained in particular in the characterizing part. of it.
  • the flywheel according to the invention consists of a hub 10 and a rim 20 joined to each other by at least one branch or arm 30, approximately radially.
  • the hub 10 is metallic and has a configuration which makes it possible to mount it on the end piece of the end of the steering column which is arranged in the passenger compartment.
  • This hub is provided with all the usual fixing means, in particular with screw and nut and with cone cones. If necessary, the hub is fitted with an energy absorber which improves safety conditions.
  • This hub can also be equipped with a device for fine adjustment of its angular setting in order to perfect the orientation of the steering wheel for aesthetic reasons.
  • the rim 20 has an approximately circular configuration. It is made, for example, of a metal tube made of steel or aluminum. The ends 21 facing the rim are left thus, or if necessary, butted by welding as illustrated in the embodiment of FIG. 1. In the case where the rim is discontinuous, it can be made to extend by curved legs 22, approximately centripetal, as illustrated in the embodiment of FIG. 2.
  • This hub 10 and this rim 20 are joined to each other by at least one branch 30, approximately radial, made of at least one synthetic material.
  • this branch 30 comprises a sheath 31 which envelops the hub 10 and a sheath 32 which at least locally covers the rim 20.
  • the rim 20 is deformed in a zone 23 which is covered, at least locally, by the sheath 32 of the branch 30.
  • This zone 23 is given a cross section different from that of the rest of the rim.
  • the section 23 in this zone is of non-circular profile, for example elliptical as drawn so as to obtain a good anchoring of the rim and of the branch.
  • the branch 30 is obtained directly by overmolding the hub 10 and the rim 20.
  • use is preferably made of synthetic materials which are in the form of semi-finished products, for example thermoplastics (TRE), thermosets (SMC). This overmolding is obtained in a single operation.
  • TRE thermoplastics
  • SMC thermosets
  • This operation uses compression rather than injection. This allows to have isotropic materials whose material is, if necessary, reinforced with various fibers, long or not, continuous or not, or other fillers, for example mineral or organic.
  • a TRE the procedure is carried out with a pressure of approximately 200 bars, a material temperature of approximately 220 ° C. and a mold temperature of approximately 50 to 60 ° C.
  • an SMC the procedure is carried out with a pressure of approximately 100 bars, a material temperature of the order of that of the ambient and a mold temperature of the order of approximately 140 to 145 ° C.
  • FIG. 1 includes an energy absorber 11.
  • the steering wheel according to the invention has assemblies at the junctions of different materials which meet all the requirements of the standards, in particular in terms of safety and which relate to shocks and fatigue tests or alternating bending.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (10)

1. Verfahren zur Herstellung eines Lenkrads für ein Kraftfahrzeug, das unter anderem aus einer zentralen Nabe aus Metall, einer sich über den Umfang erstreckenden Felge aus Metall und mindestens einem annähernd radialen Arm besteht, der die Nabe und die Felge miteinander verbindet, eine die Nabe umhüllende Muffe und eine die Felge wenigstens örtlich bedeckende Umhüllung besitzt und das einzige aus Kunststoff hergestellte Teil ist, dadurch gekennzeichnet, daß ein Kunststoff verwendet wird, der im Zustand eines Halbprodukts vorliegt,und daß dieser Kunststoff in einem einzigen Arbeits preßgeformt wird, um direkt einen einstückigen Arm mit seiner Muffe und seiner Umhüllung zu erhalten, die an der Nabe bzw. an der Muffe befestigt sind.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für den Arm ein thermoplastischer Kunststoff (TRE) verwendet wird.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für den Arm ein wärmehärtender Kunststoff (SMC) verwendet wird.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein Kunststoff im Zustand eines Halbprodukts verwendet wird, das vorzugsweise mit langen oder kontinuierlichen Fasern bewehrt ist.
5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Felge wenigstens in der Zone verformt wird, die mit der Umhüllung bedeckt werden soll, um ihr einen nicht kreisförmigen querschnitt zu verleihen.
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine rohrförmige Felge verwendet wird.
7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine kontinuierliche Felge verwendet wird.
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die kontinuierliche Felge durch Verschweißen ihrer stumpf aneinandergefügten Enden gebildet wird.
9. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß eine unkontinuierliche Felge verwendet wird.
10.Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß eine Felge verwendet wird, die durch Schenkel verlängert ist, die annähernd zentripetal gebogen sind.
EP89400402A 1988-02-19 1989-02-13 Verfahren zur Herstellung eines Lenkrads, insbesondere für Kraftfahrzeuge Expired - Lifetime EP0329542B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802040 1988-02-19
FR8802040A FR2627448B1 (fr) 1988-02-19 1988-02-19 Volant de direction notamment pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP0329542A1 EP0329542A1 (de) 1989-08-23
EP0329542B1 true EP0329542B1 (de) 1992-05-06

Family

ID=9363450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400402A Expired - Lifetime EP0329542B1 (de) 1988-02-19 1989-02-13 Verfahren zur Herstellung eines Lenkrads, insbesondere für Kraftfahrzeuge

Country Status (5)

Country Link
US (1) US4976801A (de)
EP (1) EP0329542B1 (de)
DE (1) DE68901400D1 (de)
ES (1) ES2031693T3 (de)
FR (1) FR2627448B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04166468A (ja) * 1990-10-29 1992-06-12 Toyoda Gosei Co Ltd エアバッグ装置付きステアリングホイール
US5310218A (en) * 1990-11-27 1994-05-10 Mazda Motor Corporation Steering wheel structure for vehicle
US5356178A (en) * 1992-04-20 1994-10-18 Ryusaku Numata Energy absorbing steering wheel
US5624131A (en) * 1993-01-04 1997-04-29 Izumi Corporation Driver side airbag cover
US5732602A (en) * 1996-03-12 1998-03-31 Schwartz; Noah Handle having resilient material incorporated therein
CA2200820C (en) * 1996-03-25 2000-04-11 Grant Products Steering wheel overlay
US5988014A (en) * 1996-06-21 1999-11-23 Trw Automotive Safety Systems Gmbh Sheet-metal steering wheel
FR2751604B1 (fr) * 1996-07-25 1998-10-16 Ecia Equip Composants Ind Auto Volant de direction, notamment de vehicule automobile
FR2774348B1 (fr) 1998-02-04 2000-03-03 Roulements Soc Nouvelle Armature de volant a capteur de couple integre ou rapporte pour dispositif de direction de vehicule
US6546829B1 (en) 1999-12-28 2003-04-15 A. Michel Despreaux Marine steering wheel assembly
GB2409715A (en) † 2003-12-31 2005-07-06 Autoliv Dev Moulding of a plastic steering wheel integral with a metal frame by injecting a propellant to form a cavity

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409645A (en) * 1944-10-21 1946-10-22 Canal Nat Bank Resin-fiber article and method of making the same
FR2153670A5 (de) * 1971-09-20 1973-05-04 Citroen Sa
GB1571902A (en) * 1977-04-14 1980-07-23 Ball Plastics Ltd Method of manufactureof steering wheel
JPS5547959A (en) * 1978-09-27 1980-04-05 Katsuhiko Minagawa Weight reduced steering wheel
DE2941760A1 (de) * 1979-10-16 1981-04-30 Karl Schmidt Gmbh, 7107 Neckarsulm Lenkrad
DE2947197A1 (de) * 1979-11-23 1981-06-04 Karl Schmidt Gmbh, 7107 Neckarsulm Einspeichen-lenkrad
FR2518479B1 (fr) * 1981-12-22 1986-12-05 Peugeot Aciers Outillage Sa Volant d'automobile et son procede de fabrication
WO1984003673A1 (en) * 1983-03-15 1984-09-27 Mitsubishi Electric Corp Steering wheel
DE3425959C2 (de) * 1984-07-14 1994-02-10 Kolbenschmidt Ag Kraftfahrzeug-Lenkrad
JPS6164581A (ja) * 1984-09-06 1986-04-02 Toyota Motor Corp 繊維強化樹脂製ステアリングホイ−ル
DE3625372A1 (de) * 1986-07-26 1988-02-04 Kolbenschmidt Ag Lenkrad

Also Published As

Publication number Publication date
US4976801A (en) 1990-12-11
FR2627448A1 (fr) 1989-08-25
DE68901400D1 (de) 1992-06-11
EP0329542A1 (de) 1989-08-23
ES2031693T3 (es) 1992-12-16
FR2627448B1 (fr) 1992-10-23

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